After being rearranged and simplified, which two of the following equations could be solved using the quadratic formula?
A. 5x2 + 2x - 4 = 2x2
B. 2x2 – 3x + 10 = 2x+ 21
O C. 2x2 - 6x - 7 = 2x2
D. 5x2 – 3x+ 10 = 2x2

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

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the answer is 15 to your question